I will say I have one funny regression with my HDMI monitor where it sometimes goes blank for a bit when app goes full-screen on another monitor or right after wake-up. I laugh at this, because it's still a superior experience, and the kernel version that introduced this, fixed another quirk. Because the problem isn't with Linux here, but that this monitor has a broken ass firmware. And it resets itself after waking up from sleep or changing inputs, I had problems with this under Windows too, and other monitors don't do this. But I'm not going to point fingers at wrong direction, plus current state of things doesn't bother me. Same cannot be said about Windows, where another one of my monitors would randomly reset itself from time to time, which would cause the screen to remove itself from the system and cause the whole system to get 1-2 minute long aneurysm (hope you weren't gaming during that, especially a multiplayer game...). Meanwhile if that thing happens to this monitor on Linux, simply nothing happens and I don't even notice it.

Sooo maybe it's dumb luck that shit works better or just as well on Linux. But it's real. I didn't buy anything specifically for Linux, other than always sticking to AMD and avoiding NVIDIA, because I've long despised the latter. My whole system works great, the laptop I randomly purchases (AMD-based) works great, my parents' laptop works great, my grandma's computer works great, my work machine works great (well certainly much better than on Windows, though it's not a powerful machine), my friend-with-NVIDIA's computer works great (surprisingly), my other friend's computer works great (after figuring out how to install Arch; also with a broken monitor firmware suffering btw), his girlfriend's computer also works great.

Maybe it's actually dumb misfortune for those who have problems or some terribly obscure hardware. Maybe I live in some great lucky bubble where things work for the most part around me. Hard to tell which group is a majority and which isn't.

I do have the fingerprint reader on my laptop not working, that's unfortunate, but I forgot it's even a thing, since I never had one on another machine anyway. That same poor laptop got a bunch of 1-star reviews on the store's website for "poor work culture" just because Windows 11 at setup or idle would ramp up its fans to 100% for no reason, this never happens on Linux unless maybe I actually intentionally hammer it with something. It's crazy.

Okay one thing I'll have to admit, about one actual thing not working well, oh irony: my Steam Deck is the only device that has some huge problems with my Wi-Fi router. Just that device out of like 20 others. And just with that router. Drat. I'll have to see if the next major OpenWrt version will improve it.

Aaaaanyway, can you tell me more about the DP+HDMI problem? I'm actually somewhat curious. And what GPU do you have. I'm wondering if it's related to anything I've ever seen, or something else entirely.